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Comparing libev/ev.c (file contents):
Revision 1.12 by root, Wed Oct 31 09:23:17 2007 UTC vs.
Revision 1.271 by root, Mon Nov 3 12:13:15 2008 UTC

1/*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1
58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
66# endif
67
68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
74# endif
75
76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
90# endif
91
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
132#endif
133
1#include <math.h> 134#include <math.h>
2#include <stdlib.h> 135#include <stdlib.h>
3#include <unistd.h>
4#include <fcntl.h> 136#include <fcntl.h>
5#include <signal.h> 137#include <stddef.h>
6 138
7#include <stdio.h> 139#include <stdio.h>
8 140
9#include <assert.h> 141#include <assert.h>
10#include <errno.h> 142#include <errno.h>
11#include <sys/time.h> 143#include <sys/types.h>
12#include <time.h> 144#include <time.h>
13 145
14#define HAVE_EPOLL 1 146#include <signal.h>
15 147
16#ifndef HAVE_MONOTONIC 148#ifdef EV_H
17# ifdef CLOCK_MONOTONIC 149# include EV_H
18# define HAVE_MONOTONIC 1 150#else
151# include "ev.h"
152#endif
153
154#ifndef _WIN32
155# include <sys/time.h>
156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# include <io.h>
160# define WIN32_LEAN_AND_MEAN
161# include <windows.h>
162# ifndef EV_SELECT_IS_WINSOCKET
163# define EV_SELECT_IS_WINSOCKET 1
19# endif 164# endif
20#endif 165#endif
21 166
22#ifndef HAVE_SELECT 167/* this block tries to deduce configuration from header-defined symbols and defaults */
23# define HAVE_SELECT 1 168
169#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171# define EV_USE_MONOTONIC 1
172# else
173# define EV_USE_MONOTONIC 0
24#endif 174# endif
175#endif
25 176
26#ifndef HAVE_EPOLL 177#ifndef EV_USE_REALTIME
27# define HAVE_EPOLL 0 178# define EV_USE_REALTIME 0
179#endif
180
181#ifndef EV_USE_NANOSLEEP
182# if _POSIX_C_SOURCE >= 199309L
183# define EV_USE_NANOSLEEP 1
184# else
185# define EV_USE_NANOSLEEP 0
28#endif 186# endif
187#endif
29 188
30#ifndef HAVE_REALTIME 189#ifndef EV_USE_SELECT
31# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 190# define EV_USE_SELECT 1
191#endif
192
193#ifndef EV_USE_POLL
194# ifdef _WIN32
195# define EV_USE_POLL 0
196# else
197# define EV_USE_POLL 1
32#endif 198# endif
199#endif
200
201#ifndef EV_USE_EPOLL
202# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203# define EV_USE_EPOLL 1
204# else
205# define EV_USE_EPOLL 0
206# endif
207#endif
208
209#ifndef EV_USE_KQUEUE
210# define EV_USE_KQUEUE 0
211#endif
212
213#ifndef EV_USE_PORT
214# define EV_USE_PORT 0
215#endif
216
217#ifndef EV_USE_INOTIFY
218# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
219# define EV_USE_INOTIFY 1
220# else
221# define EV_USE_INOTIFY 0
222# endif
223#endif
224
225#ifndef EV_PID_HASHSIZE
226# if EV_MINIMAL
227# define EV_PID_HASHSIZE 1
228# else
229# define EV_PID_HASHSIZE 16
230# endif
231#endif
232
233#ifndef EV_INOTIFY_HASHSIZE
234# if EV_MINIMAL
235# define EV_INOTIFY_HASHSIZE 1
236# else
237# define EV_INOTIFY_HASHSIZE 16
238# endif
239#endif
240
241#ifndef EV_USE_EVENTFD
242# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
243# define EV_USE_EVENTFD 1
244# else
245# define EV_USE_EVENTFD 0
246# endif
247#endif
248
249#if 0 /* debugging */
250# define EV_VERIFY 3
251# define EV_USE_4HEAP 1
252# define EV_HEAP_CACHE_AT 1
253#endif
254
255#ifndef EV_VERIFY
256# define EV_VERIFY !EV_MINIMAL
257#endif
258
259#ifndef EV_USE_4HEAP
260# define EV_USE_4HEAP !EV_MINIMAL
261#endif
262
263#ifndef EV_HEAP_CACHE_AT
264# define EV_HEAP_CACHE_AT !EV_MINIMAL
265#endif
266
267/* this block fixes any misconfiguration where we know we run into trouble otherwise */
268
269#ifndef CLOCK_MONOTONIC
270# undef EV_USE_MONOTONIC
271# define EV_USE_MONOTONIC 0
272#endif
273
274#ifndef CLOCK_REALTIME
275# undef EV_USE_REALTIME
276# define EV_USE_REALTIME 0
277#endif
278
279#if !EV_STAT_ENABLE
280# undef EV_USE_INOTIFY
281# define EV_USE_INOTIFY 0
282#endif
283
284#if !EV_USE_NANOSLEEP
285# ifndef _WIN32
286# include <sys/select.h>
287# endif
288#endif
289
290#if EV_USE_INOTIFY
291# include <sys/utsname.h>
292# include <sys/statfs.h>
293# include <sys/inotify.h>
294/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
295# ifndef IN_DONT_FOLLOW
296# undef EV_USE_INOTIFY
297# define EV_USE_INOTIFY 0
298# endif
299#endif
300
301#if EV_SELECT_IS_WINSOCKET
302# include <winsock.h>
303#endif
304
305#if EV_USE_EVENTFD
306/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
307# include <stdint.h>
308# ifdef __cplusplus
309extern "C" {
310# endif
311int eventfd (unsigned int initval, int flags);
312# ifdef __cplusplus
313}
314# endif
315#endif
316
317/**/
318
319#if EV_VERIFY >= 3
320# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
321#else
322# define EV_FREQUENT_CHECK do { } while (0)
323#endif
324
325/*
326 * This is used to avoid floating point rounding problems.
327 * It is added to ev_rt_now when scheduling periodics
328 * to ensure progress, time-wise, even when rounding
329 * errors are against us.
330 * This value is good at least till the year 4000.
331 * Better solutions welcome.
332 */
333#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
33 334
34#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 335#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35#define MAX_BLOCKTIME 60. 336#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
337/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
36 338
37#include "ev.h" 339#if __GNUC__ >= 4
340# define expect(expr,value) __builtin_expect ((expr),(value))
341# define noinline __attribute__ ((noinline))
342#else
343# define expect(expr,value) (expr)
344# define noinline
345# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
346# define inline
347# endif
348#endif
38 349
39struct ev_watcher { 350#define expect_false(expr) expect ((expr) != 0, 0)
40 EV_WATCHER (ev_watcher); 351#define expect_true(expr) expect ((expr) != 0, 1)
41}; 352#define inline_size static inline
42 353
43struct ev_watcher_list { 354#if EV_MINIMAL
44 EV_WATCHER_LIST (ev_watcher_list); 355# define inline_speed static noinline
45}; 356#else
357# define inline_speed static inline
358#endif
46 359
47struct ev_watcher_time { 360#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
48 EV_WATCHER_TIME (ev_watcher_time); 361#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
49};
50 362
363#define EMPTY /* required for microsofts broken pseudo-c compiler */
364#define EMPTY2(a,b) /* used to suppress some warnings */
365
51typedef struct ev_watcher *W; 366typedef ev_watcher *W;
52typedef struct ev_watcher_list *WL; 367typedef ev_watcher_list *WL;
53typedef struct ev_watcher_time *WT; 368typedef ev_watcher_time *WT;
54 369
55static ev_tstamp now, diff; /* monotonic clock */ 370#define ev_active(w) ((W)(w))->active
371#define ev_at(w) ((WT)(w))->at
372
373#if EV_USE_MONOTONIC
374/* sig_atomic_t is used to avoid per-thread variables or locking but still */
375/* giving it a reasonably high chance of working on typical architetcures */
376static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
377#endif
378
379#ifdef _WIN32
380# include "ev_win32.c"
381#endif
382
383/*****************************************************************************/
384
385static void (*syserr_cb)(const char *msg);
386
387void
388ev_set_syserr_cb (void (*cb)(const char *msg))
389{
390 syserr_cb = cb;
391}
392
393static void noinline
394ev_syserr (const char *msg)
395{
396 if (!msg)
397 msg = "(libev) system error";
398
399 if (syserr_cb)
400 syserr_cb (msg);
401 else
402 {
403 perror (msg);
404 abort ();
405 }
406}
407
408static void *
409ev_realloc_emul (void *ptr, long size)
410{
411 /* some systems, notably openbsd and darwin, fail to properly
412 * implement realloc (x, 0) (as required by both ansi c-98 and
413 * the single unix specification, so work around them here.
414 */
415
416 if (size)
417 return realloc (ptr, size);
418
419 free (ptr);
420 return 0;
421}
422
423static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
424
425void
426ev_set_allocator (void *(*cb)(void *ptr, long size))
427{
428 alloc = cb;
429}
430
431inline_speed void *
432ev_realloc (void *ptr, long size)
433{
434 ptr = alloc (ptr, size);
435
436 if (!ptr && size)
437 {
438 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
439 abort ();
440 }
441
442 return ptr;
443}
444
445#define ev_malloc(size) ev_realloc (0, (size))
446#define ev_free(ptr) ev_realloc ((ptr), 0)
447
448/*****************************************************************************/
449
450typedef struct
451{
452 WL head;
453 unsigned char events;
454 unsigned char reify;
455 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
456 unsigned char unused;
457#if EV_USE_EPOLL
458 unsigned int egen; /* generation counter to counter epoll bugs */
459#endif
460#if EV_SELECT_IS_WINSOCKET
461 SOCKET handle;
462#endif
463} ANFD;
464
465typedef struct
466{
467 W w;
468 int events;
469} ANPENDING;
470
471#if EV_USE_INOTIFY
472/* hash table entry per inotify-id */
473typedef struct
474{
475 WL head;
476} ANFS;
477#endif
478
479/* Heap Entry */
480#if EV_HEAP_CACHE_AT
481 typedef struct {
482 ev_tstamp at;
483 WT w;
484 } ANHE;
485
486 #define ANHE_w(he) (he).w /* access watcher, read-write */
487 #define ANHE_at(he) (he).at /* access cached at, read-only */
488 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
489#else
490 typedef WT ANHE;
491
492 #define ANHE_w(he) (he)
493 #define ANHE_at(he) (he)->at
494 #define ANHE_at_cache(he)
495#endif
496
497#if EV_MULTIPLICITY
498
499 struct ev_loop
500 {
501 ev_tstamp ev_rt_now;
502 #define ev_rt_now ((loop)->ev_rt_now)
503 #define VAR(name,decl) decl;
504 #include "ev_vars.h"
505 #undef VAR
506 };
507 #include "ev_wrap.h"
508
509 static struct ev_loop default_loop_struct;
510 struct ev_loop *ev_default_loop_ptr;
511
512#else
513
56ev_tstamp ev_now; 514 ev_tstamp ev_rt_now;
57int ev_method; 515 #define VAR(name,decl) static decl;
516 #include "ev_vars.h"
517 #undef VAR
58 518
59static int have_monotonic; /* runtime */ 519 static int ev_default_loop_ptr;
60 520
61static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 521#endif
62static void (*method_modify)(int fd, int oev, int nev);
63static void (*method_poll)(ev_tstamp timeout);
64 522
65/*****************************************************************************/ 523/*****************************************************************************/
66 524
67ev_tstamp 525ev_tstamp
68ev_time (void) 526ev_time (void)
69{ 527{
70#if HAVE_REALTIME 528#if EV_USE_REALTIME
71 struct timespec ts; 529 struct timespec ts;
72 clock_gettime (CLOCK_REALTIME, &ts); 530 clock_gettime (CLOCK_REALTIME, &ts);
73 return ts.tv_sec + ts.tv_nsec * 1e-9; 531 return ts.tv_sec + ts.tv_nsec * 1e-9;
74#else 532#else
75 struct timeval tv; 533 struct timeval tv;
76 gettimeofday (&tv, 0); 534 gettimeofday (&tv, 0);
77 return tv.tv_sec + tv.tv_usec * 1e-6; 535 return tv.tv_sec + tv.tv_usec * 1e-6;
78#endif 536#endif
79} 537}
80 538
81static ev_tstamp 539ev_tstamp inline_size
82get_clock (void) 540get_clock (void)
83{ 541{
84#if HAVE_MONOTONIC 542#if EV_USE_MONOTONIC
85 if (have_monotonic) 543 if (expect_true (have_monotonic))
86 { 544 {
87 struct timespec ts; 545 struct timespec ts;
88 clock_gettime (CLOCK_MONOTONIC, &ts); 546 clock_gettime (CLOCK_MONOTONIC, &ts);
89 return ts.tv_sec + ts.tv_nsec * 1e-9; 547 return ts.tv_sec + ts.tv_nsec * 1e-9;
90 } 548 }
91#endif 549#endif
92 550
93 return ev_time (); 551 return ev_time ();
94} 552}
95 553
96#define array_needsize(base,cur,cnt,init) \ 554#if EV_MULTIPLICITY
97 if ((cnt) > cur) \ 555ev_tstamp
98 { \ 556ev_now (EV_P)
99 int newcnt = cur ? cur << 1 : 16; \ 557{
100 fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ 558 return ev_rt_now;
101 base = realloc (base, sizeof (*base) * (newcnt)); \ 559}
102 init (base + cur, newcnt - cur); \ 560#endif
103 cur = newcnt; \ 561
562void
563ev_sleep (ev_tstamp delay)
564{
565 if (delay > 0.)
104 } 566 {
567#if EV_USE_NANOSLEEP
568 struct timespec ts;
569
570 ts.tv_sec = (time_t)delay;
571 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
572
573 nanosleep (&ts, 0);
574#elif defined(_WIN32)
575 Sleep ((unsigned long)(delay * 1e3));
576#else
577 struct timeval tv;
578
579 tv.tv_sec = (time_t)delay;
580 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
581
582 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
583 /* somehting nto guaranteed by newer posix versions, but guaranteed */
584 /* by older ones */
585 select (0, 0, 0, 0, &tv);
586#endif
587 }
588}
105 589
106/*****************************************************************************/ 590/*****************************************************************************/
107 591
592#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
593
594int inline_size
595array_nextsize (int elem, int cur, int cnt)
596{
597 int ncur = cur + 1;
598
599 do
600 ncur <<= 1;
601 while (cnt > ncur);
602
603 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
604 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
605 {
606 ncur *= elem;
607 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
608 ncur = ncur - sizeof (void *) * 4;
609 ncur /= elem;
610 }
611
612 return ncur;
613}
614
615static noinline void *
616array_realloc (int elem, void *base, int *cur, int cnt)
617{
618 *cur = array_nextsize (elem, *cur, cnt);
619 return ev_realloc (base, elem * *cur);
620}
621
622#define array_init_zero(base,count) \
623 memset ((void *)(base), 0, sizeof (*(base)) * (count))
624
625#define array_needsize(type,base,cur,cnt,init) \
626 if (expect_false ((cnt) > (cur))) \
627 { \
628 int ocur_ = (cur); \
629 (base) = (type *)array_realloc \
630 (sizeof (type), (base), &(cur), (cnt)); \
631 init ((base) + (ocur_), (cur) - ocur_); \
632 }
633
634#if 0
635#define array_slim(type,stem) \
636 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
637 { \
638 stem ## max = array_roundsize (stem ## cnt >> 1); \
639 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
640 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
641 }
642#endif
643
644#define array_free(stem, idx) \
645 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
646
647/*****************************************************************************/
648
649void noinline
650ev_feed_event (EV_P_ void *w, int revents)
651{
652 W w_ = (W)w;
653 int pri = ABSPRI (w_);
654
655 if (expect_false (w_->pending))
656 pendings [pri][w_->pending - 1].events |= revents;
657 else
658 {
659 w_->pending = ++pendingcnt [pri];
660 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
661 pendings [pri][w_->pending - 1].w = w_;
662 pendings [pri][w_->pending - 1].events = revents;
663 }
664}
665
666void inline_speed
667queue_events (EV_P_ W *events, int eventcnt, int type)
668{
669 int i;
670
671 for (i = 0; i < eventcnt; ++i)
672 ev_feed_event (EV_A_ events [i], type);
673}
674
675/*****************************************************************************/
676
677void inline_speed
678fd_event (EV_P_ int fd, int revents)
679{
680 ANFD *anfd = anfds + fd;
681 ev_io *w;
682
683 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
684 {
685 int ev = w->events & revents;
686
687 if (ev)
688 ev_feed_event (EV_A_ (W)w, ev);
689 }
690}
691
692void
693ev_feed_fd_event (EV_P_ int fd, int revents)
694{
695 if (fd >= 0 && fd < anfdmax)
696 fd_event (EV_A_ fd, revents);
697}
698
699void inline_size
700fd_reify (EV_P)
701{
702 int i;
703
704 for (i = 0; i < fdchangecnt; ++i)
705 {
706 int fd = fdchanges [i];
707 ANFD *anfd = anfds + fd;
708 ev_io *w;
709
710 unsigned char events = 0;
711
712 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
713 events |= (unsigned char)w->events;
714
715#if EV_SELECT_IS_WINSOCKET
716 if (events)
717 {
718 unsigned long arg;
719 #ifdef EV_FD_TO_WIN32_HANDLE
720 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
721 #else
722 anfd->handle = _get_osfhandle (fd);
723 #endif
724 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
725 }
726#endif
727
728 {
729 unsigned char o_events = anfd->events;
730 unsigned char o_reify = anfd->reify;
731
732 anfd->reify = 0;
733 anfd->events = events;
734
735 if (o_events != events || o_reify & EV_IOFDSET)
736 backend_modify (EV_A_ fd, o_events, events);
737 }
738 }
739
740 fdchangecnt = 0;
741}
742
743void inline_size
744fd_change (EV_P_ int fd, int flags)
745{
746 unsigned char reify = anfds [fd].reify;
747 anfds [fd].reify |= flags;
748
749 if (expect_true (!reify))
750 {
751 ++fdchangecnt;
752 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
753 fdchanges [fdchangecnt - 1] = fd;
754 }
755}
756
757void inline_speed
758fd_kill (EV_P_ int fd)
759{
760 ev_io *w;
761
762 while ((w = (ev_io *)anfds [fd].head))
763 {
764 ev_io_stop (EV_A_ w);
765 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
766 }
767}
768
769int inline_size
770fd_valid (int fd)
771{
772#ifdef _WIN32
773 return _get_osfhandle (fd) != -1;
774#else
775 return fcntl (fd, F_GETFD) != -1;
776#endif
777}
778
779/* called on EBADF to verify fds */
780static void noinline
781fd_ebadf (EV_P)
782{
783 int fd;
784
785 for (fd = 0; fd < anfdmax; ++fd)
786 if (anfds [fd].events)
787 if (!fd_valid (fd) && errno == EBADF)
788 fd_kill (EV_A_ fd);
789}
790
791/* called on ENOMEM in select/poll to kill some fds and retry */
792static void noinline
793fd_enomem (EV_P)
794{
795 int fd;
796
797 for (fd = anfdmax; fd--; )
798 if (anfds [fd].events)
799 {
800 fd_kill (EV_A_ fd);
801 return;
802 }
803}
804
805/* usually called after fork if backend needs to re-arm all fds from scratch */
806static void noinline
807fd_rearm_all (EV_P)
808{
809 int fd;
810
811 for (fd = 0; fd < anfdmax; ++fd)
812 if (anfds [fd].events)
813 {
814 anfds [fd].events = 0;
815 anfds [fd].emask = 0;
816 fd_change (EV_A_ fd, EV_IOFDSET | 1);
817 }
818}
819
820/*****************************************************************************/
821
822/*
823 * the heap functions want a real array index. array index 0 uis guaranteed to not
824 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
825 * the branching factor of the d-tree.
826 */
827
828/*
829 * at the moment we allow libev the luxury of two heaps,
830 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
831 * which is more cache-efficient.
832 * the difference is about 5% with 50000+ watchers.
833 */
834#if EV_USE_4HEAP
835
836#define DHEAP 4
837#define HEAP0 (DHEAP - 1) /* index of first element in heap */
838#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
839#define UPHEAP_DONE(p,k) ((p) == (k))
840
841/* away from the root */
842void inline_speed
843downheap (ANHE *heap, int N, int k)
844{
845 ANHE he = heap [k];
846 ANHE *E = heap + N + HEAP0;
847
848 for (;;)
849 {
850 ev_tstamp minat;
851 ANHE *minpos;
852 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
853
854 /* find minimum child */
855 if (expect_true (pos + DHEAP - 1 < E))
856 {
857 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
858 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
859 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
860 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
861 }
862 else if (pos < E)
863 {
864 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
865 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
866 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
867 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
868 }
869 else
870 break;
871
872 if (ANHE_at (he) <= minat)
873 break;
874
875 heap [k] = *minpos;
876 ev_active (ANHE_w (*minpos)) = k;
877
878 k = minpos - heap;
879 }
880
881 heap [k] = he;
882 ev_active (ANHE_w (he)) = k;
883}
884
885#else /* 4HEAP */
886
887#define HEAP0 1
888#define HPARENT(k) ((k) >> 1)
889#define UPHEAP_DONE(p,k) (!(p))
890
891/* away from the root */
892void inline_speed
893downheap (ANHE *heap, int N, int k)
894{
895 ANHE he = heap [k];
896
897 for (;;)
898 {
899 int c = k << 1;
900
901 if (c > N + HEAP0 - 1)
902 break;
903
904 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
905 ? 1 : 0;
906
907 if (ANHE_at (he) <= ANHE_at (heap [c]))
908 break;
909
910 heap [k] = heap [c];
911 ev_active (ANHE_w (heap [k])) = k;
912
913 k = c;
914 }
915
916 heap [k] = he;
917 ev_active (ANHE_w (he)) = k;
918}
919#endif
920
921/* towards the root */
922void inline_speed
923upheap (ANHE *heap, int k)
924{
925 ANHE he = heap [k];
926
927 for (;;)
928 {
929 int p = HPARENT (k);
930
931 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
932 break;
933
934 heap [k] = heap [p];
935 ev_active (ANHE_w (heap [k])) = k;
936 k = p;
937 }
938
939 heap [k] = he;
940 ev_active (ANHE_w (he)) = k;
941}
942
943void inline_size
944adjustheap (ANHE *heap, int N, int k)
945{
946 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
947 upheap (heap, k);
948 else
949 downheap (heap, N, k);
950}
951
952/* rebuild the heap: this function is used only once and executed rarely */
953void inline_size
954reheap (ANHE *heap, int N)
955{
956 int i;
957
958 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
959 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
960 for (i = 0; i < N; ++i)
961 upheap (heap, i + HEAP0);
962}
963
964/*****************************************************************************/
965
108typedef struct 966typedef struct
109{ 967{
110 struct ev_io *head; 968 WL head;
111 unsigned char wev, rev; /* want, received event set */ 969 EV_ATOMIC_T gotsig;
112} ANFD;
113
114static ANFD *anfds;
115static int anfdmax;
116
117static int *fdchanges;
118static int fdchangemax, fdchangecnt;
119
120static void
121anfds_init (ANFD *base, int count)
122{
123 while (count--)
124 {
125 base->head = 0;
126 base->wev = base->rev = EV_NONE;
127 ++base;
128 }
129}
130
131typedef struct
132{
133 W w;
134 int events;
135} ANPENDING;
136
137static ANPENDING *pendings;
138static int pendingmax, pendingcnt;
139
140static void
141event (W w, int events)
142{
143 w->pending = ++pendingcnt;
144 array_needsize (pendings, pendingmax, pendingcnt, );
145 pendings [pendingcnt - 1].w = w;
146 pendings [pendingcnt - 1].events = events;
147}
148
149static void
150fd_event (int fd, int events)
151{
152 ANFD *anfd = anfds + fd;
153 struct ev_io *w;
154
155 for (w = anfd->head; w; w = w->next)
156 {
157 int ev = w->events & events;
158
159 if (ev)
160 event ((W)w, ev);
161 }
162}
163
164static void
165queue_events (W *events, int eventcnt, int type)
166{
167 int i;
168
169 for (i = 0; i < eventcnt; ++i)
170 event (events [i], type);
171}
172
173/*****************************************************************************/
174
175static struct ev_timer **timers;
176static int timermax, timercnt;
177
178static struct ev_periodic **periodics;
179static int periodicmax, periodiccnt;
180
181static void
182upheap (WT *timers, int k)
183{
184 WT w = timers [k];
185
186 while (k && timers [k >> 1]->at > w->at)
187 {
188 timers [k] = timers [k >> 1];
189 timers [k]->active = k + 1;
190 k >>= 1;
191 }
192
193 timers [k] = w;
194 timers [k]->active = k + 1;
195
196}
197
198static void
199downheap (WT *timers, int N, int k)
200{
201 WT w = timers [k];
202
203 while (k < (N >> 1))
204 {
205 int j = k << 1;
206
207 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
208 ++j;
209
210 if (w->at <= timers [j]->at)
211 break;
212
213 timers [k] = timers [j];
214 timers [k]->active = k + 1;
215 k = j;
216 }
217
218 timers [k] = w;
219 timers [k]->active = k + 1;
220}
221
222/*****************************************************************************/
223
224typedef struct
225{
226 struct ev_signal *head;
227 sig_atomic_t gotsig;
228} ANSIG; 970} ANSIG;
229 971
230static ANSIG *signals; 972static ANSIG *signals;
231static int signalmax; 973static int signalmax;
232 974
233static int sigpipe [2]; 975static EV_ATOMIC_T gotsig;
234static sig_atomic_t gotsig; 976
235static struct ev_io sigev; 977/*****************************************************************************/
978
979void inline_speed
980fd_intern (int fd)
981{
982#ifdef _WIN32
983 unsigned long arg = 1;
984 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
985#else
986 fcntl (fd, F_SETFD, FD_CLOEXEC);
987 fcntl (fd, F_SETFL, O_NONBLOCK);
988#endif
989}
990
991static void noinline
992evpipe_init (EV_P)
993{
994 if (!ev_is_active (&pipeev))
995 {
996#if EV_USE_EVENTFD
997 if ((evfd = eventfd (0, 0)) >= 0)
998 {
999 evpipe [0] = -1;
1000 fd_intern (evfd);
1001 ev_io_set (&pipeev, evfd, EV_READ);
1002 }
1003 else
1004#endif
1005 {
1006 while (pipe (evpipe))
1007 ev_syserr ("(libev) error creating signal/async pipe");
1008
1009 fd_intern (evpipe [0]);
1010 fd_intern (evpipe [1]);
1011 ev_io_set (&pipeev, evpipe [0], EV_READ);
1012 }
1013
1014 ev_io_start (EV_A_ &pipeev);
1015 ev_unref (EV_A); /* watcher should not keep loop alive */
1016 }
1017}
1018
1019void inline_size
1020evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1021{
1022 if (!*flag)
1023 {
1024 int old_errno = errno; /* save errno because write might clobber it */
1025
1026 *flag = 1;
1027
1028#if EV_USE_EVENTFD
1029 if (evfd >= 0)
1030 {
1031 uint64_t counter = 1;
1032 write (evfd, &counter, sizeof (uint64_t));
1033 }
1034 else
1035#endif
1036 write (evpipe [1], &old_errno, 1);
1037
1038 errno = old_errno;
1039 }
1040}
236 1041
237static void 1042static void
238signals_init (ANSIG *base, int count) 1043pipecb (EV_P_ ev_io *iow, int revents)
239{ 1044{
240 while (count--) 1045#if EV_USE_EVENTFD
1046 if (evfd >= 0)
1047 {
1048 uint64_t counter;
1049 read (evfd, &counter, sizeof (uint64_t));
241 { 1050 }
242 base->head = 0; 1051 else
1052#endif
1053 {
1054 char dummy;
1055 read (evpipe [0], &dummy, 1);
1056 }
1057
1058 if (gotsig && ev_is_default_loop (EV_A))
1059 {
1060 int signum;
243 base->gotsig = 0; 1061 gotsig = 0;
244 ++base; 1062
1063 for (signum = signalmax; signum--; )
1064 if (signals [signum].gotsig)
1065 ev_feed_signal_event (EV_A_ signum + 1);
1066 }
1067
1068#if EV_ASYNC_ENABLE
1069 if (gotasync)
245 } 1070 {
1071 int i;
1072 gotasync = 0;
1073
1074 for (i = asynccnt; i--; )
1075 if (asyncs [i]->sent)
1076 {
1077 asyncs [i]->sent = 0;
1078 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1079 }
1080 }
1081#endif
246} 1082}
1083
1084/*****************************************************************************/
247 1085
248static void 1086static void
249sighandler (int signum) 1087ev_sighandler (int signum)
250{ 1088{
1089#if EV_MULTIPLICITY
1090 struct ev_loop *loop = &default_loop_struct;
1091#endif
1092
1093#if _WIN32
1094 signal (signum, ev_sighandler);
1095#endif
1096
251 signals [signum - 1].gotsig = 1; 1097 signals [signum - 1].gotsig = 1;
1098 evpipe_write (EV_A_ &gotsig);
1099}
252 1100
253 if (!gotsig) 1101void noinline
1102ev_feed_signal_event (EV_P_ int signum)
1103{
1104 WL w;
1105
1106#if EV_MULTIPLICITY
1107 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1108#endif
1109
1110 --signum;
1111
1112 if (signum < 0 || signum >= signalmax)
1113 return;
1114
1115 signals [signum].gotsig = 0;
1116
1117 for (w = signals [signum].head; w; w = w->next)
1118 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1119}
1120
1121/*****************************************************************************/
1122
1123static WL childs [EV_PID_HASHSIZE];
1124
1125#ifndef _WIN32
1126
1127static ev_signal childev;
1128
1129#ifndef WIFCONTINUED
1130# define WIFCONTINUED(status) 0
1131#endif
1132
1133void inline_speed
1134child_reap (EV_P_ int chain, int pid, int status)
1135{
1136 ev_child *w;
1137 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1138
1139 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1140 {
1141 if ((w->pid == pid || !w->pid)
1142 && (!traced || (w->flags & 1)))
1143 {
1144 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1145 w->rpid = pid;
1146 w->rstatus = status;
1147 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1148 }
1149 }
1150}
1151
1152#ifndef WCONTINUED
1153# define WCONTINUED 0
1154#endif
1155
1156static void
1157childcb (EV_P_ ev_signal *sw, int revents)
1158{
1159 int pid, status;
1160
1161 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1162 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1163 if (!WCONTINUED
1164 || errno != EINVAL
1165 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1166 return;
1167
1168 /* make sure we are called again until all children have been reaped */
1169 /* we need to do it this way so that the callback gets called before we continue */
1170 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1171
1172 child_reap (EV_A_ pid, pid, status);
1173 if (EV_PID_HASHSIZE > 1)
1174 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1175}
1176
1177#endif
1178
1179/*****************************************************************************/
1180
1181#if EV_USE_PORT
1182# include "ev_port.c"
1183#endif
1184#if EV_USE_KQUEUE
1185# include "ev_kqueue.c"
1186#endif
1187#if EV_USE_EPOLL
1188# include "ev_epoll.c"
1189#endif
1190#if EV_USE_POLL
1191# include "ev_poll.c"
1192#endif
1193#if EV_USE_SELECT
1194# include "ev_select.c"
1195#endif
1196
1197int
1198ev_version_major (void)
1199{
1200 return EV_VERSION_MAJOR;
1201}
1202
1203int
1204ev_version_minor (void)
1205{
1206 return EV_VERSION_MINOR;
1207}
1208
1209/* return true if we are running with elevated privileges and should ignore env variables */
1210int inline_size
1211enable_secure (void)
1212{
1213#ifdef _WIN32
1214 return 0;
1215#else
1216 return getuid () != geteuid ()
1217 || getgid () != getegid ();
1218#endif
1219}
1220
1221unsigned int
1222ev_supported_backends (void)
1223{
1224 unsigned int flags = 0;
1225
1226 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1227 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1228 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1229 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1230 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1231
1232 return flags;
1233}
1234
1235unsigned int
1236ev_recommended_backends (void)
1237{
1238 unsigned int flags = ev_supported_backends ();
1239
1240#ifndef __NetBSD__
1241 /* kqueue is borked on everything but netbsd apparently */
1242 /* it usually doesn't work correctly on anything but sockets and pipes */
1243 flags &= ~EVBACKEND_KQUEUE;
1244#endif
1245#ifdef __APPLE__
1246 // flags &= ~EVBACKEND_KQUEUE; for documentation
1247 flags &= ~EVBACKEND_POLL;
1248#endif
1249
1250 return flags;
1251}
1252
1253unsigned int
1254ev_embeddable_backends (void)
1255{
1256 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1257
1258 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1259 /* please fix it and tell me how to detect the fix */
1260 flags &= ~EVBACKEND_EPOLL;
1261
1262 return flags;
1263}
1264
1265unsigned int
1266ev_backend (EV_P)
1267{
1268 return backend;
1269}
1270
1271unsigned int
1272ev_loop_count (EV_P)
1273{
1274 return loop_count;
1275}
1276
1277void
1278ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1279{
1280 io_blocktime = interval;
1281}
1282
1283void
1284ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1285{
1286 timeout_blocktime = interval;
1287}
1288
1289static void noinline
1290loop_init (EV_P_ unsigned int flags)
1291{
1292 if (!backend)
1293 {
1294#if EV_USE_MONOTONIC
254 { 1295 {
1296 struct timespec ts;
1297 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1298 have_monotonic = 1;
1299 }
1300#endif
1301
1302 ev_rt_now = ev_time ();
1303 mn_now = get_clock ();
1304 now_floor = mn_now;
1305 rtmn_diff = ev_rt_now - mn_now;
1306
1307 io_blocktime = 0.;
1308 timeout_blocktime = 0.;
1309 backend = 0;
1310 backend_fd = -1;
1311 gotasync = 0;
1312#if EV_USE_INOTIFY
1313 fs_fd = -2;
1314#endif
1315
1316 /* pid check not overridable via env */
1317#ifndef _WIN32
1318 if (flags & EVFLAG_FORKCHECK)
1319 curpid = getpid ();
1320#endif
1321
1322 if (!(flags & EVFLAG_NOENV)
1323 && !enable_secure ()
1324 && getenv ("LIBEV_FLAGS"))
1325 flags = atoi (getenv ("LIBEV_FLAGS"));
1326
1327 if (!(flags & 0x0000ffffU))
1328 flags |= ev_recommended_backends ();
1329
1330#if EV_USE_PORT
1331 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1332#endif
1333#if EV_USE_KQUEUE
1334 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1335#endif
1336#if EV_USE_EPOLL
1337 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1338#endif
1339#if EV_USE_POLL
1340 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1341#endif
1342#if EV_USE_SELECT
1343 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1344#endif
1345
1346 ev_init (&pipeev, pipecb);
1347 ev_set_priority (&pipeev, EV_MAXPRI);
1348 }
1349}
1350
1351static void noinline
1352loop_destroy (EV_P)
1353{
1354 int i;
1355
1356 if (ev_is_active (&pipeev))
1357 {
1358 ev_ref (EV_A); /* signal watcher */
1359 ev_io_stop (EV_A_ &pipeev);
1360
1361#if EV_USE_EVENTFD
1362 if (evfd >= 0)
1363 close (evfd);
1364#endif
1365
1366 if (evpipe [0] >= 0)
1367 {
1368 close (evpipe [0]);
1369 close (evpipe [1]);
1370 }
1371 }
1372
1373#if EV_USE_INOTIFY
1374 if (fs_fd >= 0)
1375 close (fs_fd);
1376#endif
1377
1378 if (backend_fd >= 0)
1379 close (backend_fd);
1380
1381#if EV_USE_PORT
1382 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1383#endif
1384#if EV_USE_KQUEUE
1385 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1386#endif
1387#if EV_USE_EPOLL
1388 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1389#endif
1390#if EV_USE_POLL
1391 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1392#endif
1393#if EV_USE_SELECT
1394 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1395#endif
1396
1397 for (i = NUMPRI; i--; )
1398 {
1399 array_free (pending, [i]);
1400#if EV_IDLE_ENABLE
1401 array_free (idle, [i]);
1402#endif
1403 }
1404
1405 ev_free (anfds); anfdmax = 0;
1406
1407 /* have to use the microsoft-never-gets-it-right macro */
1408 array_free (fdchange, EMPTY);
1409 array_free (timer, EMPTY);
1410#if EV_PERIODIC_ENABLE
1411 array_free (periodic, EMPTY);
1412#endif
1413#if EV_FORK_ENABLE
1414 array_free (fork, EMPTY);
1415#endif
1416 array_free (prepare, EMPTY);
1417 array_free (check, EMPTY);
1418#if EV_ASYNC_ENABLE
1419 array_free (async, EMPTY);
1420#endif
1421
1422 backend = 0;
1423}
1424
1425#if EV_USE_INOTIFY
1426void inline_size infy_fork (EV_P);
1427#endif
1428
1429void inline_size
1430loop_fork (EV_P)
1431{
1432#if EV_USE_PORT
1433 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1434#endif
1435#if EV_USE_KQUEUE
1436 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1437#endif
1438#if EV_USE_EPOLL
1439 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1440#endif
1441#if EV_USE_INOTIFY
1442 infy_fork (EV_A);
1443#endif
1444
1445 if (ev_is_active (&pipeev))
1446 {
1447 /* this "locks" the handlers against writing to the pipe */
1448 /* while we modify the fd vars */
255 gotsig = 1; 1449 gotsig = 1;
256 write (sigpipe [1], &gotsig, 1); 1450#if EV_ASYNC_ENABLE
257 } 1451 gotasync = 1;
258} 1452#endif
259 1453
260static void 1454 ev_ref (EV_A);
261sigcb (struct ev_io *iow, int revents) 1455 ev_io_stop (EV_A_ &pipeev);
1456
1457#if EV_USE_EVENTFD
1458 if (evfd >= 0)
1459 close (evfd);
1460#endif
1461
1462 if (evpipe [0] >= 0)
1463 {
1464 close (evpipe [0]);
1465 close (evpipe [1]);
1466 }
1467
1468 evpipe_init (EV_A);
1469 /* now iterate over everything, in case we missed something */
1470 pipecb (EV_A_ &pipeev, EV_READ);
1471 }
1472
1473 postfork = 0;
1474}
1475
1476#if EV_MULTIPLICITY
1477
1478struct ev_loop *
1479ev_loop_new (unsigned int flags)
262{ 1480{
263 struct ev_signal *w; 1481 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1482
1483 memset (loop, 0, sizeof (struct ev_loop));
1484
1485 loop_init (EV_A_ flags);
1486
1487 if (ev_backend (EV_A))
1488 return loop;
1489
1490 return 0;
1491}
1492
1493void
1494ev_loop_destroy (EV_P)
1495{
1496 loop_destroy (EV_A);
1497 ev_free (loop);
1498}
1499
1500void
1501ev_loop_fork (EV_P)
1502{
1503 postfork = 1; /* must be in line with ev_default_fork */
1504}
1505
1506#if EV_VERIFY
1507static void noinline
1508verify_watcher (EV_P_ W w)
1509{
1510 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1511
1512 if (w->pending)
1513 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1514}
1515
1516static void noinline
1517verify_heap (EV_P_ ANHE *heap, int N)
1518{
264 int sig; 1519 int i;
265 1520
266 gotsig = 0; 1521 for (i = HEAP0; i < N + HEAP0; ++i)
267 read (sigpipe [0], &revents, 1); 1522 {
1523 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1524 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1525 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
268 1526
269 for (sig = signalmax; sig--; ) 1527 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
270 if (signals [sig].gotsig) 1528 }
1529}
1530
1531static void noinline
1532array_verify (EV_P_ W *ws, int cnt)
1533{
1534 while (cnt--)
1535 {
1536 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1537 verify_watcher (EV_A_ ws [cnt]);
1538 }
1539}
1540#endif
1541
1542void
1543ev_loop_verify (EV_P)
1544{
1545#if EV_VERIFY
1546 int i;
1547 WL w;
1548
1549 assert (activecnt >= -1);
1550
1551 assert (fdchangemax >= fdchangecnt);
1552 for (i = 0; i < fdchangecnt; ++i)
1553 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1554
1555 assert (anfdmax >= 0);
1556 for (i = 0; i < anfdmax; ++i)
1557 for (w = anfds [i].head; w; w = w->next)
271 { 1558 {
272 signals [sig].gotsig = 0; 1559 verify_watcher (EV_A_ (W)w);
273 1560 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
274 for (w = signals [sig].head; w; w = w->next) 1561 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
275 event ((W)w, EV_SIGNAL);
276 } 1562 }
277}
278 1563
279static void 1564 assert (timermax >= timercnt);
280siginit (void) 1565 verify_heap (EV_A_ timers, timercnt);
281{
282 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
283 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
284 1566
285 /* rather than sort out wether we really need nb, set it */ 1567#if EV_PERIODIC_ENABLE
286 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); 1568 assert (periodicmax >= periodiccnt);
287 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); 1569 verify_heap (EV_A_ periodics, periodiccnt);
1570#endif
288 1571
289 evio_set (&sigev, sigpipe [0], EV_READ); 1572 for (i = NUMPRI; i--; )
290 evio_start (&sigev); 1573 {
1574 assert (pendingmax [i] >= pendingcnt [i]);
1575#if EV_IDLE_ENABLE
1576 assert (idleall >= 0);
1577 assert (idlemax [i] >= idlecnt [i]);
1578 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1579#endif
1580 }
1581
1582#if EV_FORK_ENABLE
1583 assert (forkmax >= forkcnt);
1584 array_verify (EV_A_ (W *)forks, forkcnt);
1585#endif
1586
1587#if EV_ASYNC_ENABLE
1588 assert (asyncmax >= asynccnt);
1589 array_verify (EV_A_ (W *)asyncs, asynccnt);
1590#endif
1591
1592 assert (preparemax >= preparecnt);
1593 array_verify (EV_A_ (W *)prepares, preparecnt);
1594
1595 assert (checkmax >= checkcnt);
1596 array_verify (EV_A_ (W *)checks, checkcnt);
1597
1598# if 0
1599 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1600 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1601# endif
1602#endif
1603}
1604
1605#endif /* multiplicity */
1606
1607#if EV_MULTIPLICITY
1608struct ev_loop *
1609ev_default_loop_init (unsigned int flags)
1610#else
1611int
1612ev_default_loop (unsigned int flags)
1613#endif
1614{
1615 if (!ev_default_loop_ptr)
1616 {
1617#if EV_MULTIPLICITY
1618 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1619#else
1620 ev_default_loop_ptr = 1;
1621#endif
1622
1623 loop_init (EV_A_ flags);
1624
1625 if (ev_backend (EV_A))
1626 {
1627#ifndef _WIN32
1628 ev_signal_init (&childev, childcb, SIGCHLD);
1629 ev_set_priority (&childev, EV_MAXPRI);
1630 ev_signal_start (EV_A_ &childev);
1631 ev_unref (EV_A); /* child watcher should not keep loop alive */
1632#endif
1633 }
1634 else
1635 ev_default_loop_ptr = 0;
1636 }
1637
1638 return ev_default_loop_ptr;
1639}
1640
1641void
1642ev_default_destroy (void)
1643{
1644#if EV_MULTIPLICITY
1645 struct ev_loop *loop = ev_default_loop_ptr;
1646#endif
1647
1648 ev_default_loop_ptr = 0;
1649
1650#ifndef _WIN32
1651 ev_ref (EV_A); /* child watcher */
1652 ev_signal_stop (EV_A_ &childev);
1653#endif
1654
1655 loop_destroy (EV_A);
1656}
1657
1658void
1659ev_default_fork (void)
1660{
1661#if EV_MULTIPLICITY
1662 struct ev_loop *loop = ev_default_loop_ptr;
1663#endif
1664
1665 postfork = 1; /* must be in line with ev_loop_fork */
291} 1666}
292 1667
293/*****************************************************************************/ 1668/*****************************************************************************/
294 1669
295static struct ev_idle **idles; 1670void
296static int idlemax, idlecnt; 1671ev_invoke (EV_P_ void *w, int revents)
297
298static struct ev_check **checks;
299static int checkmax, checkcnt;
300
301/*****************************************************************************/
302
303#if HAVE_EPOLL
304# include "ev_epoll.c"
305#endif
306#if HAVE_SELECT
307# include "ev_select.c"
308#endif
309
310int ev_init (int flags)
311{ 1672{
312#if HAVE_MONOTONIC 1673 EV_CB_INVOKE ((W)w, revents);
313 {
314 struct timespec ts;
315 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
316 have_monotonic = 1;
317 }
318#endif
319
320 ev_now = ev_time ();
321 now = get_clock ();
322 diff = ev_now - now;
323
324 if (pipe (sigpipe))
325 return 0;
326
327 ev_method = EVMETHOD_NONE;
328#if HAVE_EPOLL
329 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
330#endif
331#if HAVE_SELECT
332 if (ev_method == EVMETHOD_NONE) select_init (flags);
333#endif
334
335 if (ev_method)
336 {
337 evw_init (&sigev, sigcb);
338 siginit ();
339 }
340
341 return ev_method;
342} 1674}
343 1675
344/*****************************************************************************/ 1676void inline_speed
345 1677call_pending (EV_P)
346void ev_prefork (void)
347{ 1678{
348 /* nop */
349}
350
351void ev_postfork_parent (void)
352{
353 /* nop */
354}
355
356void ev_postfork_child (void)
357{
358#if HAVE_EPOLL
359 if (ev_method == EVMETHOD_EPOLL)
360 epoll_postfork_child ();
361#endif
362
363 evio_stop (&sigev);
364 close (sigpipe [0]);
365 close (sigpipe [1]);
366 pipe (sigpipe);
367 siginit ();
368}
369
370/*****************************************************************************/
371
372static void
373fd_reify (void)
374{
375 int i; 1679 int pri;
376 1680
377 for (i = 0; i < fdchangecnt; ++i) 1681 for (pri = NUMPRI; pri--; )
1682 while (pendingcnt [pri])
378 { 1683 {
379 int fd = fdchanges [i]; 1684 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
380 ANFD *anfd = anfds + fd;
381 struct ev_io *w;
382 1685
383 int wev = 0; 1686 if (expect_true (p->w))
1687 {
1688 /*assert (("non-pending watcher on pending list", p->w->pending));*/
384 1689
385 for (w = anfd->head; w; w = w->next) 1690 p->w->pending = 0;
386 wev |= w->events; 1691 EV_CB_INVOKE (p->w, p->events);
1692 EV_FREQUENT_CHECK;
1693 }
1694 }
1695}
387 1696
388 if (anfd->wev != wev) 1697#if EV_IDLE_ENABLE
1698void inline_size
1699idle_reify (EV_P)
1700{
1701 if (expect_false (idleall))
1702 {
1703 int pri;
1704
1705 for (pri = NUMPRI; pri--; )
389 { 1706 {
390 method_modify (fd, anfd->wev, wev); 1707 if (pendingcnt [pri])
391 anfd->wev = wev; 1708 break;
1709
1710 if (idlecnt [pri])
1711 {
1712 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1713 break;
1714 }
392 } 1715 }
393 } 1716 }
394
395 fdchangecnt = 0;
396} 1717}
1718#endif
397 1719
398static void 1720void inline_size
399call_pending ()
400{
401 int i;
402
403 for (i = 0; i < pendingcnt; ++i)
404 {
405 ANPENDING *p = pendings + i;
406
407 if (p->w)
408 {
409 p->w->pending = 0;
410 p->w->cb (p->w, p->events);
411 }
412 }
413
414 pendingcnt = 0;
415}
416
417static void
418timers_reify () 1721timers_reify (EV_P)
419{ 1722{
1723 EV_FREQUENT_CHECK;
1724
420 while (timercnt && timers [0]->at <= now) 1725 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
421 { 1726 {
422 struct ev_timer *w = timers [0]; 1727 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1728
1729 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
423 1730
424 /* first reschedule or stop timer */ 1731 /* first reschedule or stop timer */
425 if (w->repeat) 1732 if (w->repeat)
426 { 1733 {
427 w->at = now + w->repeat; 1734 ev_at (w) += w->repeat;
428 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1735 if (ev_at (w) < mn_now)
1736 ev_at (w) = mn_now;
1737
1738 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1739
1740 ANHE_at_cache (timers [HEAP0]);
429 downheap ((WT *)timers, timercnt, 0); 1741 downheap (timers, timercnt, HEAP0);
430 } 1742 }
431 else 1743 else
432 evtimer_stop (w); /* nonrepeating: stop timer */ 1744 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
433 1745
1746 EV_FREQUENT_CHECK;
434 event ((W)w, EV_TIMEOUT); 1747 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
435 } 1748 }
436} 1749}
437 1750
438static void 1751#if EV_PERIODIC_ENABLE
1752void inline_size
439periodics_reify () 1753periodics_reify (EV_P)
440{ 1754{
1755 EV_FREQUENT_CHECK;
1756
441 while (periodiccnt && periodics [0]->at <= ev_now) 1757 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
442 { 1758 {
443 struct ev_periodic *w = periodics [0]; 1759 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1760
1761 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
444 1762
445 /* first reschedule or stop timer */ 1763 /* first reschedule or stop timer */
446 if (w->interval) 1764 if (w->reschedule_cb)
447 { 1765 {
448 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1766 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
449 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1767
1768 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1769
1770 ANHE_at_cache (periodics [HEAP0]);
450 downheap ((WT *)periodics, periodiccnt, 0); 1771 downheap (periodics, periodiccnt, HEAP0);
1772 }
1773 else if (w->interval)
1774 {
1775 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1776 /* if next trigger time is not sufficiently in the future, put it there */
1777 /* this might happen because of floating point inexactness */
1778 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1779 {
1780 ev_at (w) += w->interval;
1781
1782 /* if interval is unreasonably low we might still have a time in the past */
1783 /* so correct this. this will make the periodic very inexact, but the user */
1784 /* has effectively asked to get triggered more often than possible */
1785 if (ev_at (w) < ev_rt_now)
1786 ev_at (w) = ev_rt_now;
1787 }
1788
1789 ANHE_at_cache (periodics [HEAP0]);
1790 downheap (periodics, periodiccnt, HEAP0);
451 } 1791 }
452 else 1792 else
453 evperiodic_stop (w); /* nonrepeating: stop timer */ 1793 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
454 1794
455 event ((W)w, EV_TIMEOUT); 1795 EV_FREQUENT_CHECK;
1796 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
456 } 1797 }
457} 1798}
458 1799
459static void 1800static void noinline
460time_jump (ev_tstamp diff) 1801periodics_reschedule (EV_P)
461{ 1802{
462 int i; 1803 int i;
463 1804
464 /* adjust periodics */ 1805 /* adjust periodics after time jump */
465 for (i = 0; i < periodiccnt; ++i) 1806 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
466 { 1807 {
467 struct ev_periodic *w = periodics [i]; 1808 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
468 1809
1810 if (w->reschedule_cb)
1811 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
469 if (w->interval) 1812 else if (w->interval)
1813 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1814
1815 ANHE_at_cache (periodics [i]);
1816 }
1817
1818 reheap (periodics, periodiccnt);
1819}
1820#endif
1821
1822void inline_speed
1823time_update (EV_P_ ev_tstamp max_block)
1824{
1825 int i;
1826
1827#if EV_USE_MONOTONIC
1828 if (expect_true (have_monotonic))
1829 {
1830 ev_tstamp odiff = rtmn_diff;
1831
1832 mn_now = get_clock ();
1833
1834 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1835 /* interpolate in the meantime */
1836 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
470 { 1837 {
471 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1838 ev_rt_now = rtmn_diff + mn_now;
1839 return;
1840 }
472 1841
473 if (fabs (diff) >= 1e-4) 1842 now_floor = mn_now;
1843 ev_rt_now = ev_time ();
1844
1845 /* loop a few times, before making important decisions.
1846 * on the choice of "4": one iteration isn't enough,
1847 * in case we get preempted during the calls to
1848 * ev_time and get_clock. a second call is almost guaranteed
1849 * to succeed in that case, though. and looping a few more times
1850 * doesn't hurt either as we only do this on time-jumps or
1851 * in the unlikely event of having been preempted here.
1852 */
1853 for (i = 4; --i; )
1854 {
1855 rtmn_diff = ev_rt_now - mn_now;
1856
1857 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1858 return; /* all is well */
1859
1860 ev_rt_now = ev_time ();
1861 mn_now = get_clock ();
1862 now_floor = mn_now;
1863 }
1864
1865# if EV_PERIODIC_ENABLE
1866 periodics_reschedule (EV_A);
1867# endif
1868 /* no timer adjustment, as the monotonic clock doesn't jump */
1869 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1870 }
1871 else
1872#endif
1873 {
1874 ev_rt_now = ev_time ();
1875
1876 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1877 {
1878#if EV_PERIODIC_ENABLE
1879 periodics_reschedule (EV_A);
1880#endif
1881 /* adjust timers. this is easy, as the offset is the same for all of them */
1882 for (i = 0; i < timercnt; ++i)
474 { 1883 {
475 evperiodic_stop (w); 1884 ANHE *he = timers + i + HEAP0;
476 evperiodic_start (w); 1885 ANHE_w (*he)->at += ev_rt_now - mn_now;
477 1886 ANHE_at_cache (*he);
478 i = 0; /* restart loop, inefficient, but time jumps should be rare */
479 } 1887 }
480 } 1888 }
481 }
482 1889
483 /* adjust timers. this is easy, as the offset is the same for all */ 1890 mn_now = ev_rt_now;
484 for (i = 0; i < timercnt; ++i)
485 timers [i]->at += diff;
486}
487
488static void
489time_update ()
490{
491 int i;
492
493 ev_now = ev_time ();
494
495 if (have_monotonic)
496 { 1891 }
497 ev_tstamp odiff = diff; 1892}
498 1893
499 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1894void
1895ev_ref (EV_P)
1896{
1897 ++activecnt;
1898}
1899
1900void
1901ev_unref (EV_P)
1902{
1903 --activecnt;
1904}
1905
1906void
1907ev_now_update (EV_P)
1908{
1909 time_update (EV_A_ 1e100);
1910}
1911
1912static int loop_done;
1913
1914void
1915ev_loop (EV_P_ int flags)
1916{
1917 loop_done = EVUNLOOP_CANCEL;
1918
1919 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1920
1921 do
1922 {
1923#if EV_VERIFY >= 2
1924 ev_loop_verify (EV_A);
1925#endif
1926
1927#ifndef _WIN32
1928 if (expect_false (curpid)) /* penalise the forking check even more */
1929 if (expect_false (getpid () != curpid))
1930 {
1931 curpid = getpid ();
1932 postfork = 1;
1933 }
1934#endif
1935
1936#if EV_FORK_ENABLE
1937 /* we might have forked, so queue fork handlers */
1938 if (expect_false (postfork))
1939 if (forkcnt)
1940 {
1941 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1942 call_pending (EV_A);
1943 }
1944#endif
1945
1946 /* queue prepare watchers (and execute them) */
1947 if (expect_false (preparecnt))
500 { 1948 {
501 now = get_clock (); 1949 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
502 diff = ev_now - now; 1950 call_pending (EV_A);
503
504 if (fabs (odiff - diff) < MIN_TIMEJUMP)
505 return; /* all is well */
506
507 ev_now = ev_time ();
508 } 1951 }
509 1952
510 time_jump (diff - odiff); 1953 if (expect_false (!activecnt))
511 } 1954 break;
512 else
513 {
514 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
515 time_jump (ev_now - now);
516 1955
517 now = ev_now; 1956 /* we might have forked, so reify kernel state if necessary */
518 } 1957 if (expect_false (postfork))
519} 1958 loop_fork (EV_A);
520 1959
521int ev_loop_done;
522
523void ev_loop (int flags)
524{
525 double block;
526 ev_loop_done = flags & EVLOOP_ONESHOT;
527
528 if (checkcnt)
529 {
530 queue_events ((W *)checks, checkcnt, EV_CHECK);
531 call_pending ();
532 }
533
534 do
535 {
536 /* update fd-related kernel structures */ 1960 /* update fd-related kernel structures */
537 fd_reify (); 1961 fd_reify (EV_A);
538 1962
539 /* calculate blocking time */ 1963 /* calculate blocking time */
1964 {
1965 ev_tstamp waittime = 0.;
1966 ev_tstamp sleeptime = 0.;
540 1967
541 /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ 1968 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
542 ev_now = ev_time ();
543
544 if (flags & EVLOOP_NONBLOCK || idlecnt)
545 block = 0.;
546 else
547 { 1969 {
1970 /* update time to cancel out callback processing overhead */
1971 time_update (EV_A_ 1e100);
1972
548 block = MAX_BLOCKTIME; 1973 waittime = MAX_BLOCKTIME;
549 1974
550 if (timercnt) 1975 if (timercnt)
551 { 1976 {
552 ev_tstamp to = timers [0]->at - get_clock () + method_fudge; 1977 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
553 if (block > to) block = to; 1978 if (waittime > to) waittime = to;
554 } 1979 }
555 1980
1981#if EV_PERIODIC_ENABLE
556 if (periodiccnt) 1982 if (periodiccnt)
557 { 1983 {
558 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1984 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
559 if (block > to) block = to; 1985 if (waittime > to) waittime = to;
560 } 1986 }
1987#endif
561 1988
562 if (block < 0.) block = 0.; 1989 if (expect_false (waittime < timeout_blocktime))
1990 waittime = timeout_blocktime;
1991
1992 sleeptime = waittime - backend_fudge;
1993
1994 if (expect_true (sleeptime > io_blocktime))
1995 sleeptime = io_blocktime;
1996
1997 if (sleeptime)
1998 {
1999 ev_sleep (sleeptime);
2000 waittime -= sleeptime;
2001 }
563 } 2002 }
564 2003
565 method_poll (block); 2004 ++loop_count;
2005 backend_poll (EV_A_ waittime);
566 2006
567 /* update ev_now, do magic */ 2007 /* update ev_rt_now, do magic */
568 time_update (); 2008 time_update (EV_A_ waittime + sleeptime);
2009 }
569 2010
570 /* queue pending timers and reschedule them */ 2011 /* queue pending timers and reschedule them */
2012 timers_reify (EV_A); /* relative timers called last */
2013#if EV_PERIODIC_ENABLE
571 periodics_reify (); /* absolute timers first */ 2014 periodics_reify (EV_A); /* absolute timers called first */
572 timers_reify (); /* relative timers second */ 2015#endif
573 2016
2017#if EV_IDLE_ENABLE
574 /* queue idle watchers unless io or timers are pending */ 2018 /* queue idle watchers unless other events are pending */
575 if (!pendingcnt) 2019 idle_reify (EV_A);
576 queue_events ((W *)idles, idlecnt, EV_IDLE); 2020#endif
577 2021
578 /* queue check and possibly idle watchers */ 2022 /* queue check watchers, to be executed first */
2023 if (expect_false (checkcnt))
579 queue_events ((W *)checks, checkcnt, EV_CHECK); 2024 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
580 2025
581 call_pending (); 2026 call_pending (EV_A);
582 } 2027 }
583 while (!ev_loop_done); 2028 while (expect_true (
2029 activecnt
2030 && !loop_done
2031 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2032 ));
2033
2034 if (loop_done == EVUNLOOP_ONE)
2035 loop_done = EVUNLOOP_CANCEL;
2036}
2037
2038void
2039ev_unloop (EV_P_ int how)
2040{
2041 loop_done = how;
584} 2042}
585 2043
586/*****************************************************************************/ 2044/*****************************************************************************/
587 2045
588static void 2046void inline_size
589wlist_add (WL *head, WL elem) 2047wlist_add (WL *head, WL elem)
590{ 2048{
591 elem->next = *head; 2049 elem->next = *head;
592 *head = elem; 2050 *head = elem;
593} 2051}
594 2052
595static void 2053void inline_size
596wlist_del (WL *head, WL elem) 2054wlist_del (WL *head, WL elem)
597{ 2055{
598 while (*head) 2056 while (*head)
599 { 2057 {
600 if (*head == elem) 2058 if (*head == elem)
… …
605 2063
606 head = &(*head)->next; 2064 head = &(*head)->next;
607 } 2065 }
608} 2066}
609 2067
610static void 2068void inline_speed
2069clear_pending (EV_P_ W w)
2070{
2071 if (w->pending)
2072 {
2073 pendings [ABSPRI (w)][w->pending - 1].w = 0;
2074 w->pending = 0;
2075 }
2076}
2077
2078int
2079ev_clear_pending (EV_P_ void *w)
2080{
2081 W w_ = (W)w;
2082 int pending = w_->pending;
2083
2084 if (expect_true (pending))
2085 {
2086 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2087 w_->pending = 0;
2088 p->w = 0;
2089 return p->events;
2090 }
2091 else
2092 return 0;
2093}
2094
2095void inline_size
2096pri_adjust (EV_P_ W w)
2097{
2098 int pri = w->priority;
2099 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2100 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2101 w->priority = pri;
2102}
2103
2104void inline_speed
611ev_start (W w, int active) 2105ev_start (EV_P_ W w, int active)
612{ 2106{
613 w->pending = 0; 2107 pri_adjust (EV_A_ w);
614 w->active = active; 2108 w->active = active;
2109 ev_ref (EV_A);
615} 2110}
616 2111
617static void 2112void inline_size
618ev_stop (W w) 2113ev_stop (EV_P_ W w)
619{ 2114{
620 if (w->pending) 2115 ev_unref (EV_A);
621 pendings [w->pending - 1].w = 0;
622
623 w->active = 0; 2116 w->active = 0;
624} 2117}
625 2118
626/*****************************************************************************/ 2119/*****************************************************************************/
627 2120
628void 2121void noinline
629evio_start (struct ev_io *w) 2122ev_io_start (EV_P_ ev_io *w)
630{ 2123{
2124 int fd = w->fd;
2125
2126 if (expect_false (ev_is_active (w)))
2127 return;
2128
2129 assert (("ev_io_start called with negative fd", fd >= 0));
2130 assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
2131
2132 EV_FREQUENT_CHECK;
2133
2134 ev_start (EV_A_ (W)w, 1);
2135 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2136 wlist_add (&anfds[fd].head, (WL)w);
2137
2138 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
2139 w->events &= ~EV_IOFDSET;
2140
2141 EV_FREQUENT_CHECK;
2142}
2143
2144void noinline
2145ev_io_stop (EV_P_ ev_io *w)
2146{
2147 clear_pending (EV_A_ (W)w);
2148 if (expect_false (!ev_is_active (w)))
2149 return;
2150
2151 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2152
2153 EV_FREQUENT_CHECK;
2154
2155 wlist_del (&anfds[w->fd].head, (WL)w);
2156 ev_stop (EV_A_ (W)w);
2157
2158 fd_change (EV_A_ w->fd, 1);
2159
2160 EV_FREQUENT_CHECK;
2161}
2162
2163void noinline
2164ev_timer_start (EV_P_ ev_timer *w)
2165{
2166 if (expect_false (ev_is_active (w)))
2167 return;
2168
2169 ev_at (w) += mn_now;
2170
2171 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2172
2173 EV_FREQUENT_CHECK;
2174
2175 ++timercnt;
2176 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2177 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2178 ANHE_w (timers [ev_active (w)]) = (WT)w;
2179 ANHE_at_cache (timers [ev_active (w)]);
2180 upheap (timers, ev_active (w));
2181
2182 EV_FREQUENT_CHECK;
2183
2184 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2185}
2186
2187void noinline
2188ev_timer_stop (EV_P_ ev_timer *w)
2189{
2190 clear_pending (EV_A_ (W)w);
2191 if (expect_false (!ev_is_active (w)))
2192 return;
2193
2194 EV_FREQUENT_CHECK;
2195
2196 {
2197 int active = ev_active (w);
2198
2199 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2200
2201 --timercnt;
2202
2203 if (expect_true (active < timercnt + HEAP0))
2204 {
2205 timers [active] = timers [timercnt + HEAP0];
2206 adjustheap (timers, timercnt, active);
2207 }
2208 }
2209
2210 EV_FREQUENT_CHECK;
2211
2212 ev_at (w) -= mn_now;
2213
2214 ev_stop (EV_A_ (W)w);
2215}
2216
2217void noinline
2218ev_timer_again (EV_P_ ev_timer *w)
2219{
2220 EV_FREQUENT_CHECK;
2221
631 if (ev_is_active (w)) 2222 if (ev_is_active (w))
2223 {
2224 if (w->repeat)
2225 {
2226 ev_at (w) = mn_now + w->repeat;
2227 ANHE_at_cache (timers [ev_active (w)]);
2228 adjustheap (timers, timercnt, ev_active (w));
2229 }
2230 else
2231 ev_timer_stop (EV_A_ w);
2232 }
2233 else if (w->repeat)
2234 {
2235 ev_at (w) = w->repeat;
2236 ev_timer_start (EV_A_ w);
2237 }
2238
2239 EV_FREQUENT_CHECK;
2240}
2241
2242#if EV_PERIODIC_ENABLE
2243void noinline
2244ev_periodic_start (EV_P_ ev_periodic *w)
2245{
2246 if (expect_false (ev_is_active (w)))
632 return; 2247 return;
633 2248
634 int fd = w->fd; 2249 if (w->reschedule_cb)
2250 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2251 else if (w->interval)
2252 {
2253 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
2254 /* this formula differs from the one in periodic_reify because we do not always round up */
2255 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2256 }
2257 else
2258 ev_at (w) = w->offset;
635 2259
636 ev_start ((W)w, 1); 2260 EV_FREQUENT_CHECK;
637 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
638 wlist_add ((WL *)&anfds[fd].head, (WL)w);
639 2261
640 ++fdchangecnt; 2262 ++periodiccnt;
641 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 2263 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
642 fdchanges [fdchangecnt - 1] = fd; 2264 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
643} 2265 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2266 ANHE_at_cache (periodics [ev_active (w)]);
2267 upheap (periodics, ev_active (w));
644 2268
645void 2269 EV_FREQUENT_CHECK;
646evio_stop (struct ev_io *w) 2270
2271 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2272}
2273
2274void noinline
2275ev_periodic_stop (EV_P_ ev_periodic *w)
647{ 2276{
2277 clear_pending (EV_A_ (W)w);
648 if (!ev_is_active (w)) 2278 if (expect_false (!ev_is_active (w)))
649 return; 2279 return;
650 2280
651 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2281 EV_FREQUENT_CHECK;
2282
2283 {
2284 int active = ev_active (w);
2285
2286 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2287
2288 --periodiccnt;
2289
2290 if (expect_true (active < periodiccnt + HEAP0))
2291 {
2292 periodics [active] = periodics [periodiccnt + HEAP0];
2293 adjustheap (periodics, periodiccnt, active);
2294 }
2295 }
2296
2297 EV_FREQUENT_CHECK;
2298
652 ev_stop ((W)w); 2299 ev_stop (EV_A_ (W)w);
653
654 ++fdchangecnt;
655 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
656 fdchanges [fdchangecnt - 1] = w->fd;
657} 2300}
658 2301
659 2302void noinline
660void 2303ev_periodic_again (EV_P_ ev_periodic *w)
661evtimer_start (struct ev_timer *w)
662{ 2304{
2305 /* TODO: use adjustheap and recalculation */
2306 ev_periodic_stop (EV_A_ w);
2307 ev_periodic_start (EV_A_ w);
2308}
2309#endif
2310
2311#ifndef SA_RESTART
2312# define SA_RESTART 0
2313#endif
2314
2315void noinline
2316ev_signal_start (EV_P_ ev_signal *w)
2317{
2318#if EV_MULTIPLICITY
2319 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2320#endif
663 if (ev_is_active (w)) 2321 if (expect_false (ev_is_active (w)))
664 return; 2322 return;
665 2323
666 w->at += now; 2324 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
667 2325
668 ev_start ((W)w, ++timercnt); 2326 evpipe_init (EV_A);
669 array_needsize (timers, timermax, timercnt, );
670 timers [timercnt - 1] = w;
671 upheap ((WT *)timers, timercnt - 1);
672}
673 2327
674void 2328 EV_FREQUENT_CHECK;
675evtimer_stop (struct ev_timer *w) 2329
2330 {
2331#ifndef _WIN32
2332 sigset_t full, prev;
2333 sigfillset (&full);
2334 sigprocmask (SIG_SETMASK, &full, &prev);
2335#endif
2336
2337 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2338
2339#ifndef _WIN32
2340 sigprocmask (SIG_SETMASK, &prev, 0);
2341#endif
2342 }
2343
2344 ev_start (EV_A_ (W)w, 1);
2345 wlist_add (&signals [w->signum - 1].head, (WL)w);
2346
2347 if (!((WL)w)->next)
2348 {
2349#if _WIN32
2350 signal (w->signum, ev_sighandler);
2351#else
2352 struct sigaction sa;
2353 sa.sa_handler = ev_sighandler;
2354 sigfillset (&sa.sa_mask);
2355 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2356 sigaction (w->signum, &sa, 0);
2357#endif
2358 }
2359
2360 EV_FREQUENT_CHECK;
2361}
2362
2363void noinline
2364ev_signal_stop (EV_P_ ev_signal *w)
676{ 2365{
2366 clear_pending (EV_A_ (W)w);
677 if (!ev_is_active (w)) 2367 if (expect_false (!ev_is_active (w)))
678 return; 2368 return;
679 2369
680 if (w->active < timercnt--) 2370 EV_FREQUENT_CHECK;
681 {
682 timers [w->active - 1] = timers [timercnt];
683 downheap ((WT *)timers, timercnt, w->active - 1);
684 }
685 2371
686 ev_stop ((W)w);
687}
688
689void
690evperiodic_start (struct ev_periodic *w)
691{
692 if (ev_is_active (w))
693 return;
694
695 /* this formula differs from the one in periodic_reify because we do not always round up */
696 if (w->interval)
697 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
698
699 ev_start ((W)w, ++periodiccnt);
700 array_needsize (periodics, periodicmax, periodiccnt, );
701 periodics [periodiccnt - 1] = w;
702 upheap ((WT *)periodics, periodiccnt - 1);
703}
704
705void
706evperiodic_stop (struct ev_periodic *w)
707{
708 if (!ev_is_active (w))
709 return;
710
711 if (w->active < periodiccnt--)
712 {
713 periodics [w->active - 1] = periodics [periodiccnt];
714 downheap ((WT *)periodics, periodiccnt, w->active - 1);
715 }
716
717 ev_stop ((W)w);
718}
719
720void
721evsignal_start (struct ev_signal *w)
722{
723 if (ev_is_active (w))
724 return;
725
726 ev_start ((W)w, 1);
727 array_needsize (signals, signalmax, w->signum, signals_init);
728 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
729
730 if (!w->next)
731 {
732 struct sigaction sa;
733 sa.sa_handler = sighandler;
734 sigfillset (&sa.sa_mask);
735 sa.sa_flags = 0;
736 sigaction (w->signum, &sa, 0);
737 }
738}
739
740void
741evsignal_stop (struct ev_signal *w)
742{
743 if (!ev_is_active (w))
744 return;
745
746 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2372 wlist_del (&signals [w->signum - 1].head, (WL)w);
747 ev_stop ((W)w); 2373 ev_stop (EV_A_ (W)w);
748 2374
749 if (!signals [w->signum - 1].head) 2375 if (!signals [w->signum - 1].head)
750 signal (w->signum, SIG_DFL); 2376 signal (w->signum, SIG_DFL);
751}
752 2377
753void evidle_start (struct ev_idle *w) 2378 EV_FREQUENT_CHECK;
2379}
2380
2381void
2382ev_child_start (EV_P_ ev_child *w)
754{ 2383{
2384#if EV_MULTIPLICITY
2385 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2386#endif
755 if (ev_is_active (w)) 2387 if (expect_false (ev_is_active (w)))
756 return; 2388 return;
757 2389
758 ev_start ((W)w, ++idlecnt); 2390 EV_FREQUENT_CHECK;
759 array_needsize (idles, idlemax, idlecnt, );
760 idles [idlecnt - 1] = w;
761}
762 2391
763void evidle_stop (struct ev_idle *w) 2392 ev_start (EV_A_ (W)w, 1);
764{ 2393 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
765 idles [w->active - 1] = idles [--idlecnt];
766 ev_stop ((W)w);
767}
768 2394
769void evcheck_start (struct ev_check *w) 2395 EV_FREQUENT_CHECK;
2396}
2397
2398void
2399ev_child_stop (EV_P_ ev_child *w)
770{ 2400{
771 if (ev_is_active (w)) 2401 clear_pending (EV_A_ (W)w);
2402 if (expect_false (!ev_is_active (w)))
772 return; 2403 return;
773 2404
2405 EV_FREQUENT_CHECK;
2406
2407 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2408 ev_stop (EV_A_ (W)w);
2409
2410 EV_FREQUENT_CHECK;
2411}
2412
2413#if EV_STAT_ENABLE
2414
2415# ifdef _WIN32
2416# undef lstat
2417# define lstat(a,b) _stati64 (a,b)
2418# endif
2419
2420#define DEF_STAT_INTERVAL 5.0074891
2421#define MIN_STAT_INTERVAL 0.1074891
2422
2423static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2424
2425#if EV_USE_INOTIFY
2426# define EV_INOTIFY_BUFSIZE 8192
2427
2428static void noinline
2429infy_add (EV_P_ ev_stat *w)
2430{
2431 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2432
2433 if (w->wd < 0)
2434 {
2435 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2436
2437 /* monitor some parent directory for speedup hints */
2438 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2439 /* but an efficiency issue only */
2440 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2441 {
2442 char path [4096];
2443 strcpy (path, w->path);
2444
2445 do
2446 {
2447 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2448 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2449
2450 char *pend = strrchr (path, '/');
2451
2452 if (!pend)
2453 break; /* whoops, no '/', complain to your admin */
2454
2455 *pend = 0;
2456 w->wd = inotify_add_watch (fs_fd, path, mask);
2457 }
2458 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2459 }
2460 }
2461 else
2462 todo, on nfs etc., we need to poll every 60s or so
2463 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2464
2465 if (w->wd >= 0)
2466 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2467}
2468
2469static void noinline
2470infy_del (EV_P_ ev_stat *w)
2471{
2472 int slot;
2473 int wd = w->wd;
2474
2475 if (wd < 0)
2476 return;
2477
2478 w->wd = -2;
2479 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2480 wlist_del (&fs_hash [slot].head, (WL)w);
2481
2482 /* remove this watcher, if others are watching it, they will rearm */
2483 inotify_rm_watch (fs_fd, wd);
2484}
2485
2486static void noinline
2487infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2488{
2489 if (slot < 0)
2490 /* overflow, need to check for all hash slots */
2491 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2492 infy_wd (EV_A_ slot, wd, ev);
2493 else
2494 {
2495 WL w_;
2496
2497 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2498 {
2499 ev_stat *w = (ev_stat *)w_;
2500 w_ = w_->next; /* lets us remove this watcher and all before it */
2501
2502 if (w->wd == wd || wd == -1)
2503 {
2504 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2505 {
2506 w->wd = -1;
2507 infy_add (EV_A_ w); /* re-add, no matter what */
2508 }
2509
2510 stat_timer_cb (EV_A_ &w->timer, 0);
2511 }
2512 }
2513 }
2514}
2515
2516static void
2517infy_cb (EV_P_ ev_io *w, int revents)
2518{
2519 char buf [EV_INOTIFY_BUFSIZE];
2520 struct inotify_event *ev = (struct inotify_event *)buf;
2521 int ofs;
2522 int len = read (fs_fd, buf, sizeof (buf));
2523
2524 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2525 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2526}
2527
2528void inline_size
2529infy_init (EV_P)
2530{
2531 if (fs_fd != -2)
2532 return;
2533
2534 /* kernels < 2.6.25 are borked
2535 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2536 */
2537 {
2538 struct utsname buf;
2539 int major, minor, micro;
2540
2541 fs_fd = -1;
2542
2543 if (uname (&buf))
2544 return;
2545
2546 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2547 return;
2548
2549 if (major < 2
2550 || (major == 2 && minor < 6)
2551 || (major == 2 && minor == 6 && micro < 25))
2552 return;
2553 }
2554
2555 fs_fd = inotify_init ();
2556
2557 if (fs_fd >= 0)
2558 {
2559 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2560 ev_set_priority (&fs_w, EV_MAXPRI);
2561 ev_io_start (EV_A_ &fs_w);
2562 }
2563}
2564
2565void inline_size
2566infy_fork (EV_P)
2567{
2568 int slot;
2569
2570 if (fs_fd < 0)
2571 return;
2572
2573 close (fs_fd);
2574 fs_fd = inotify_init ();
2575
2576 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2577 {
2578 WL w_ = fs_hash [slot].head;
2579 fs_hash [slot].head = 0;
2580
2581 while (w_)
2582 {
2583 ev_stat *w = (ev_stat *)w_;
2584 w_ = w_->next; /* lets us add this watcher */
2585
2586 w->wd = -1;
2587
2588 if (fs_fd >= 0)
2589 infy_add (EV_A_ w); /* re-add, no matter what */
2590 else
2591 ev_timer_start (EV_A_ &w->timer);
2592 }
2593 }
2594}
2595
2596#endif
2597
2598#ifdef _WIN32
2599# define EV_LSTAT(p,b) _stati64 (p, b)
2600#else
2601# define EV_LSTAT(p,b) lstat (p, b)
2602#endif
2603
2604void
2605ev_stat_stat (EV_P_ ev_stat *w)
2606{
2607 if (lstat (w->path, &w->attr) < 0)
2608 w->attr.st_nlink = 0;
2609 else if (!w->attr.st_nlink)
2610 w->attr.st_nlink = 1;
2611}
2612
2613static void noinline
2614stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2615{
2616 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2617
2618 /* we copy this here each the time so that */
2619 /* prev has the old value when the callback gets invoked */
2620 w->prev = w->attr;
2621 ev_stat_stat (EV_A_ w);
2622
2623 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2624 if (
2625 w->prev.st_dev != w->attr.st_dev
2626 || w->prev.st_ino != w->attr.st_ino
2627 || w->prev.st_mode != w->attr.st_mode
2628 || w->prev.st_nlink != w->attr.st_nlink
2629 || w->prev.st_uid != w->attr.st_uid
2630 || w->prev.st_gid != w->attr.st_gid
2631 || w->prev.st_rdev != w->attr.st_rdev
2632 || w->prev.st_size != w->attr.st_size
2633 || w->prev.st_atime != w->attr.st_atime
2634 || w->prev.st_mtime != w->attr.st_mtime
2635 || w->prev.st_ctime != w->attr.st_ctime
2636 ) {
2637 #if EV_USE_INOTIFY
2638 if (fs_fd >= 0)
2639 {
2640 infy_del (EV_A_ w);
2641 infy_add (EV_A_ w);
2642 ev_stat_stat (EV_A_ w); /* avoid race... */
2643 }
2644 #endif
2645
2646 ev_feed_event (EV_A_ w, EV_STAT);
2647 }
2648}
2649
2650void
2651ev_stat_start (EV_P_ ev_stat *w)
2652{
2653 if (expect_false (ev_is_active (w)))
2654 return;
2655
2656 /* since we use memcmp, we need to clear any padding data etc. */
2657 memset (&w->prev, 0, sizeof (ev_statdata));
2658 memset (&w->attr, 0, sizeof (ev_statdata));
2659
2660 ev_stat_stat (EV_A_ w);
2661
2662 if (w->interval < MIN_STAT_INTERVAL)
2663 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2664
2665 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2666 ev_set_priority (&w->timer, ev_priority (w));
2667
2668#if EV_USE_INOTIFY
2669 infy_init (EV_A);
2670
2671 if (fs_fd >= 0)
2672 infy_add (EV_A_ w);
2673 else
2674#endif
2675 ev_timer_start (EV_A_ &w->timer);
2676
2677 ev_start (EV_A_ (W)w, 1);
2678
2679 EV_FREQUENT_CHECK;
2680}
2681
2682void
2683ev_stat_stop (EV_P_ ev_stat *w)
2684{
2685 clear_pending (EV_A_ (W)w);
2686 if (expect_false (!ev_is_active (w)))
2687 return;
2688
2689 EV_FREQUENT_CHECK;
2690
2691#if EV_USE_INOTIFY
2692 infy_del (EV_A_ w);
2693#endif
2694 ev_timer_stop (EV_A_ &w->timer);
2695
2696 ev_stop (EV_A_ (W)w);
2697
2698 EV_FREQUENT_CHECK;
2699}
2700#endif
2701
2702#if EV_IDLE_ENABLE
2703void
2704ev_idle_start (EV_P_ ev_idle *w)
2705{
2706 if (expect_false (ev_is_active (w)))
2707 return;
2708
2709 pri_adjust (EV_A_ (W)w);
2710
2711 EV_FREQUENT_CHECK;
2712
2713 {
2714 int active = ++idlecnt [ABSPRI (w)];
2715
2716 ++idleall;
2717 ev_start (EV_A_ (W)w, active);
2718
2719 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2720 idles [ABSPRI (w)][active - 1] = w;
2721 }
2722
2723 EV_FREQUENT_CHECK;
2724}
2725
2726void
2727ev_idle_stop (EV_P_ ev_idle *w)
2728{
2729 clear_pending (EV_A_ (W)w);
2730 if (expect_false (!ev_is_active (w)))
2731 return;
2732
2733 EV_FREQUENT_CHECK;
2734
2735 {
2736 int active = ev_active (w);
2737
2738 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2739 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2740
2741 ev_stop (EV_A_ (W)w);
2742 --idleall;
2743 }
2744
2745 EV_FREQUENT_CHECK;
2746}
2747#endif
2748
2749void
2750ev_prepare_start (EV_P_ ev_prepare *w)
2751{
2752 if (expect_false (ev_is_active (w)))
2753 return;
2754
2755 EV_FREQUENT_CHECK;
2756
2757 ev_start (EV_A_ (W)w, ++preparecnt);
2758 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2759 prepares [preparecnt - 1] = w;
2760
2761 EV_FREQUENT_CHECK;
2762}
2763
2764void
2765ev_prepare_stop (EV_P_ ev_prepare *w)
2766{
2767 clear_pending (EV_A_ (W)w);
2768 if (expect_false (!ev_is_active (w)))
2769 return;
2770
2771 EV_FREQUENT_CHECK;
2772
2773 {
2774 int active = ev_active (w);
2775
2776 prepares [active - 1] = prepares [--preparecnt];
2777 ev_active (prepares [active - 1]) = active;
2778 }
2779
2780 ev_stop (EV_A_ (W)w);
2781
2782 EV_FREQUENT_CHECK;
2783}
2784
2785void
2786ev_check_start (EV_P_ ev_check *w)
2787{
2788 if (expect_false (ev_is_active (w)))
2789 return;
2790
2791 EV_FREQUENT_CHECK;
2792
774 ev_start ((W)w, ++checkcnt); 2793 ev_start (EV_A_ (W)w, ++checkcnt);
775 array_needsize (checks, checkmax, checkcnt, ); 2794 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
776 checks [checkcnt - 1] = w; 2795 checks [checkcnt - 1] = w;
777}
778 2796
2797 EV_FREQUENT_CHECK;
2798}
2799
2800void
779void evcheck_stop (struct ev_check *w) 2801ev_check_stop (EV_P_ ev_check *w)
780{ 2802{
2803 clear_pending (EV_A_ (W)w);
2804 if (expect_false (!ev_is_active (w)))
2805 return;
2806
2807 EV_FREQUENT_CHECK;
2808
2809 {
2810 int active = ev_active (w);
2811
781 checks [w->active - 1] = checks [--checkcnt]; 2812 checks [active - 1] = checks [--checkcnt];
2813 ev_active (checks [active - 1]) = active;
2814 }
2815
782 ev_stop ((W)w); 2816 ev_stop (EV_A_ (W)w);
2817
2818 EV_FREQUENT_CHECK;
783} 2819}
2820
2821#if EV_EMBED_ENABLE
2822void noinline
2823ev_embed_sweep (EV_P_ ev_embed *w)
2824{
2825 ev_loop (w->other, EVLOOP_NONBLOCK);
2826}
2827
2828static void
2829embed_io_cb (EV_P_ ev_io *io, int revents)
2830{
2831 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2832
2833 if (ev_cb (w))
2834 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2835 else
2836 ev_loop (w->other, EVLOOP_NONBLOCK);
2837}
2838
2839static void
2840embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2841{
2842 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2843
2844 {
2845 struct ev_loop *loop = w->other;
2846
2847 while (fdchangecnt)
2848 {
2849 fd_reify (EV_A);
2850 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2851 }
2852 }
2853}
2854
2855static void
2856embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2857{
2858 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2859
2860 {
2861 struct ev_loop *loop = w->other;
2862
2863 ev_loop_fork (EV_A);
2864 }
2865}
2866
2867#if 0
2868static void
2869embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2870{
2871 ev_idle_stop (EV_A_ idle);
2872}
2873#endif
2874
2875void
2876ev_embed_start (EV_P_ ev_embed *w)
2877{
2878 if (expect_false (ev_is_active (w)))
2879 return;
2880
2881 {
2882 struct ev_loop *loop = w->other;
2883 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2884 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2885 }
2886
2887 EV_FREQUENT_CHECK;
2888
2889 ev_set_priority (&w->io, ev_priority (w));
2890 ev_io_start (EV_A_ &w->io);
2891
2892 ev_prepare_init (&w->prepare, embed_prepare_cb);
2893 ev_set_priority (&w->prepare, EV_MINPRI);
2894 ev_prepare_start (EV_A_ &w->prepare);
2895
2896 ev_fork_init (&w->fork, embed_fork_cb);
2897 ev_fork_start (EV_A_ &w->fork);
2898
2899 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2900
2901 ev_start (EV_A_ (W)w, 1);
2902
2903 EV_FREQUENT_CHECK;
2904}
2905
2906void
2907ev_embed_stop (EV_P_ ev_embed *w)
2908{
2909 clear_pending (EV_A_ (W)w);
2910 if (expect_false (!ev_is_active (w)))
2911 return;
2912
2913 EV_FREQUENT_CHECK;
2914
2915 ev_io_stop (EV_A_ &w->io);
2916 ev_prepare_stop (EV_A_ &w->prepare);
2917 ev_fork_stop (EV_A_ &w->fork);
2918
2919 EV_FREQUENT_CHECK;
2920}
2921#endif
2922
2923#if EV_FORK_ENABLE
2924void
2925ev_fork_start (EV_P_ ev_fork *w)
2926{
2927 if (expect_false (ev_is_active (w)))
2928 return;
2929
2930 EV_FREQUENT_CHECK;
2931
2932 ev_start (EV_A_ (W)w, ++forkcnt);
2933 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2934 forks [forkcnt - 1] = w;
2935
2936 EV_FREQUENT_CHECK;
2937}
2938
2939void
2940ev_fork_stop (EV_P_ ev_fork *w)
2941{
2942 clear_pending (EV_A_ (W)w);
2943 if (expect_false (!ev_is_active (w)))
2944 return;
2945
2946 EV_FREQUENT_CHECK;
2947
2948 {
2949 int active = ev_active (w);
2950
2951 forks [active - 1] = forks [--forkcnt];
2952 ev_active (forks [active - 1]) = active;
2953 }
2954
2955 ev_stop (EV_A_ (W)w);
2956
2957 EV_FREQUENT_CHECK;
2958}
2959#endif
2960
2961#if EV_ASYNC_ENABLE
2962void
2963ev_async_start (EV_P_ ev_async *w)
2964{
2965 if (expect_false (ev_is_active (w)))
2966 return;
2967
2968 evpipe_init (EV_A);
2969
2970 EV_FREQUENT_CHECK;
2971
2972 ev_start (EV_A_ (W)w, ++asynccnt);
2973 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2974 asyncs [asynccnt - 1] = w;
2975
2976 EV_FREQUENT_CHECK;
2977}
2978
2979void
2980ev_async_stop (EV_P_ ev_async *w)
2981{
2982 clear_pending (EV_A_ (W)w);
2983 if (expect_false (!ev_is_active (w)))
2984 return;
2985
2986 EV_FREQUENT_CHECK;
2987
2988 {
2989 int active = ev_active (w);
2990
2991 asyncs [active - 1] = asyncs [--asynccnt];
2992 ev_active (asyncs [active - 1]) = active;
2993 }
2994
2995 ev_stop (EV_A_ (W)w);
2996
2997 EV_FREQUENT_CHECK;
2998}
2999
3000void
3001ev_async_send (EV_P_ ev_async *w)
3002{
3003 w->sent = 1;
3004 evpipe_write (EV_A_ &gotasync);
3005}
3006#endif
784 3007
785/*****************************************************************************/ 3008/*****************************************************************************/
786 3009
787#if 1 3010struct ev_once
788 3011{
789struct ev_io wio; 3012 ev_io io;
3013 ev_timer to;
3014 void (*cb)(int revents, void *arg);
3015 void *arg;
3016};
790 3017
791static void 3018static void
792sin_cb (struct ev_io *w, int revents) 3019once_cb (EV_P_ struct ev_once *once, int revents)
793{ 3020{
794 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3021 void (*cb)(int revents, void *arg) = once->cb;
3022 void *arg = once->arg;
3023
3024 ev_io_stop (EV_A_ &once->io);
3025 ev_timer_stop (EV_A_ &once->to);
3026 ev_free (once);
3027
3028 cb (revents, arg);
795} 3029}
796 3030
797static void 3031static void
798ocb (struct ev_timer *w, int revents) 3032once_cb_io (EV_P_ ev_io *w, int revents)
799{ 3033{
800 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3034 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
801 evtimer_stop (w); 3035
802 evtimer_start (w); 3036 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
803} 3037}
804 3038
805static void 3039static void
806scb (struct ev_signal *w, int revents) 3040once_cb_to (EV_P_ ev_timer *w, int revents)
807{ 3041{
808 fprintf (stderr, "signal %x,%d\n", revents, w->signum); 3042 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
809 evio_stop (&wio);
810 evio_start (&wio);
811}
812 3043
813static void 3044 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
814gcb (struct ev_signal *w, int revents)
815{
816 fprintf (stderr, "generic %x\n", revents);
817
818} 3045}
819 3046
820int main (void) 3047void
3048ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
821{ 3049{
822 ev_init (0); 3050 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
823 3051
824 evio_init (&wio, sin_cb, 0, EV_READ); 3052 if (expect_false (!once))
825 evio_start (&wio);
826
827 struct ev_timer t[10000];
828
829#if 0
830 int i;
831 for (i = 0; i < 10000; ++i)
832 {
833 struct ev_timer *w = t + i;
834 evw_init (w, ocb, i);
835 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
836 evtimer_start (w);
837 if (drand48 () < 0.5)
838 evtimer_stop (w);
839 } 3053 {
840#endif 3054 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
841
842 struct ev_timer t1;
843 evtimer_init (&t1, ocb, 5, 10);
844 evtimer_start (&t1);
845
846 struct ev_signal sig;
847 evsignal_init (&sig, scb, SIGQUIT);
848 evsignal_start (&sig);
849
850 struct ev_check cw;
851 evcheck_init (&cw, gcb);
852 evcheck_start (&cw);
853
854 struct ev_idle iw;
855 evidle_init (&iw, gcb);
856 evidle_start (&iw);
857
858 ev_loop (0);
859
860 return 0; 3055 return;
861} 3056 }
862 3057
863#endif 3058 once->cb = cb;
3059 once->arg = arg;
864 3060
3061 ev_init (&once->io, once_cb_io);
3062 if (fd >= 0)
3063 {
3064 ev_io_set (&once->io, fd, events);
3065 ev_io_start (EV_A_ &once->io);
3066 }
865 3067
3068 ev_init (&once->to, once_cb_to);
3069 if (timeout >= 0.)
3070 {
3071 ev_timer_set (&once->to, timeout, 0.);
3072 ev_timer_start (EV_A_ &once->to);
3073 }
3074}
866 3075
3076#if EV_MULTIPLICITY
3077 #include "ev_wrap.h"
3078#endif
867 3079
3080#ifdef __cplusplus
3081}
3082#endif
3083

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